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Category:   Application (E-mail Server)  >   Microsoft Exchange Vendors:   Microsoft
Microsoft Exchange Server Bugs Permit Cross-Site Scripting, Email Spoofing, and URL Redirection Attacks
SecurityTracker Alert ID:  1031318
SecurityTracker URL:  http://securitytracker.com/id/1031318
CVE Reference:   CVE-2014-6319, CVE-2014-6325, CVE-2014-6326, CVE-2014-6336   (Links to External Site)
Updated:  Dec 11 2014
Original Entry Date:  Dec 9 2014
Impact:   Disclosure of authentication information, Disclosure of system information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   Several vulnerabilities were reported in Microsoft Exchange Server. A remote user can conduct cross-site scripting attacks. A remote user can send spoofed email. A remote user can redirect a target user to an arbitrary site.

The Outlook Web Access (OWA) interface does not properly filter HTML code from user-supplied input before displaying the input [CVE-2014-6325, CVE-2014-6326]. A remote user can create a specially crafted URL that, when loaded by a target user, will cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the OWA interface and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

OWA does not properly validate request tokens [CVE-2014-6319]. A remote user can exploit this to send email that appears to originate from a different user.

OWA does not properly validate redirection tokens [CVE-2014-6336]. A remote user can create a specially crafted link that appears to be from the target user's domain but that, when loaded by the target user, will redirect the target user's browser to an arbitrary domain.

Nikolay Anisenya, John Koerner, Adi Ivascu, and Jason Tsang Mui Chung reported these vulnerabilities.

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the Microsoft Exchange software, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

A remote user can send spoofed email.

A remote user can redirect a target user to an arbitrary site.

Solution:   The vendor has issued the following fixes:

Microsoft Exchange Server 2007 Service Pack 3:

http://www.microsoft.com/downloads/details.aspx?familyid=0839c232-3175-4308-b7c3-9781662f2fc9

Microsoft Exchange Server 2010 Service Pack 3:

[Editor's note: On December 10, 2014, Microsoft removed the link for update 2986475 due to an issue with the update.]

Microsoft Exchange Server 2013 Service Pack 1:

http://www.microsoft.com/downloads/details.aspx?familyid=d7aadea2-c0d9-4ab4-aa0d-ddbb0d26dec2

Microsoft Exchange Server 2013 Cumulative Update 6:

http://www.microsoft.com/downloads/details.aspx?familyid=f5514dd7-8760-46ff-a8e9-de2cfb6356bf

The Microsoft advisory is available at:

https://technet.microsoft.com/library/security/ms14-075

Vendor URL:  technet.microsoft.com/library/security/ms14-075 (Links to External Site)
Cause:   Access control error, Input validation error
Underlying OS:  Windows (2003), Windows (2008), Windows (2012), Windows (7)

Message History:   None.


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